Kamis, 29 Oktober 2015

HOW TO OPEN E BIKE MOTOR HUB

HOW TO OPEN 250W PLANETARY E BIKE MOTOR HUB


Brushless DC motor (BLDC motor) for E bike usually use a small motor with planetary gear. This construction was different with gearless BLDC motor.  Planetary motor hub has an advantage the small dimension but there is have hi torque power. This article was explanation how to this motor its work, how to open, what the part of inside the motor, and how to maintenance or repair.



Step by step to open this motor.

Step 1. Put off the motor from bicycle, and release some bolt from axle.


Open the all outside screw


Push the axle from another side (left side on this picture)



motor hub after opened.


Step 2. Take down the planetary gear


Open this circlip ring using special tools.




After removed the planetary gear,its will showing the part.
Remove the spies and second circlip

Open this screw and take the sun gear.

sun gear


Step 3. Removing rotor winding from stator.


Remove the small circlip inside this axle, and pull of the rotor magnetic case.

Rotor magnetic winding


Stator winding
There is 3 hall sensor position, now replace hall sensor its easy.


Step 4. How to Replace the planetary gear.



This is a simple progress, only take the circlip ring and put the planetary gear.

nylon gear in planetary gear system
one way clutch is inside the planetary carrier.


INTRODUCING  NAME OF EACH PART



part of planetary gear.

1. Sun gear
2. Planet gear
3. Planetary carrier
4. One way clutch system

where is the ring gear??.
1. ring gear is in outside case
2. out case bearing


general name all part.

1. Stator winding, there is any hall sensor, spull wire, and motor cable 
2. Rotor winding, there is any 20 poles magnet, and 2 pcs bearing
3. outcase rotor. there is ring gear in inside area
4. sun gear
5. planetary gear set. 


            

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